77HETEROCYCLIC THIOALKANEAMIDEE33METHYLL33CEPHEMM44CARBOXYLIC ACID DER IVATIVE

摘要

PURPOSE:7-Heterocyclic thioalkaneamido-3-methyl-3-cephem-4-carboxylic acid derivatives of formula I(R1 is heterocyclic group; R2 is alkylene; the heterocyclic group of R1 may be substituted with alkyl, amino or aminoalkyl and the alkylene R2 may be substituted with aryl), such as 7-[2-(1,3,4-thiadiazole-2ylthio) acetamide]-3-methyl-3-cephem-4-carboxylic acid.